<template>
  <div
    ref="rightPanel"
    :class="{show:show}"
    class="rightPanel-container"
  >
    <div class="rightPanel-background" />
    <div class="rightPanel ">
      <div
        class="handle-button pointer"
        :style="{'top':buttonTop+'px','background-color':theme}"
        @click="show=!show"
      >
        <i :class="show?'el-icon-close':'el-icon-setting'" />
      </div>
      <div class="rightPanel-items shadow">
        <slot />
      </div>
    </div>
  </div>
</template>

<script>
import { addClass, removeClass } from '@/utils';
/**
 * 右侧设置框
 * @author maolin
 */
export default {
  name: 'RightPanel',
  props: {
    /**
     * 是否设置点击界面外不关闭
     * @public
     */
    clickNotClose: {
      default: false,
      type: Boolean
    },
    /**
     * 按钮与顶部的距离
     * @public
     */
    buttonTop: {
      default: 250,
      type: Number
    }
  },
  data () {
    return {
    };
  },
  computed: {
    theme () {
      return this.$store.state.settings.theme;
    },
    show: {
      get () {
        return this.$store.state.settings.showRightPane;
      },
      set (val) {
        this.$store.dispatch('settings/changeSetting', {
          key: 'showRightPane',
          value: val
        });
      }
    }
  },
  watch: {
    show (value) {
      this.$store.dispatch('settings/changeSetting', {
        key: 'showRightPane',
        value: value
      });
      if (value && !this.clickNotClose) {
        this.addEventClick();
      }
      if (value) {
        addClass(document.body, 'showRightPanel');
      } else {
        removeClass(document.body, 'showRightPanel');
      }
    }
  },
  mounted () {
    this.insertToBody();
  },
  beforeDestroy () {
    const elx = this.$refs.rightPanel;
    elx.remove();
  },
  methods: {
    /**
     * 通过点击框外关闭设置框
     * @private
     */
    addEventClick () {
      window.addEventListener('click', this.closeSidebar);
    },
    /**
     * 关闭设置框
     * @private
     */
    closeSidebar (evt) {
      const parent = evt.target.closest('.rightPanel');
      if (!parent) {
        this.show = false;
        window.removeEventListener('click', this.closeSidebar);
      }
    },
    /**
     * 将右侧设置框插入到body
     * @private
     */
    insertToBody () {
      const elx = this.$refs.rightPanel;
      const body = document.querySelector('body');
      body.insertBefore(elx, body.firstChild);
    }
  }
};
</script>

<style>
.showRightPanel {
  overflow: hidden;
  position: relative;
  width: calc(100% - 15px);
}
</style>

<style lang="scss" scoped>
.rightPanel-background {
  position: fixed;
  top: 0;
  left: 0;
  opacity: 0;
  transition: opacity .3s cubic-bezier(.7, .3, .1, 1);
  background: rgba(0, 0, 0, .2);
  z-index: -1;
}

.rightPanel {
  width: 100%;
  max-width: 290px;
  height: 100vh;
  position: fixed;
  top: 0;
  right: 0;
  box-shadow: 0px 0px 15px 0px rgba(0, 0, 0, .05);
  transition: all .25s cubic-bezier(.7, .3, .1, 1);
  transform: translate(100%);
  background: #fff;
  z-index: 40000;
}

.show {
  transition: all .3s cubic-bezier(.7, .3, .1, 1);

  .rightPanel-background {
    z-index: 20000;
    opacity: 1;
    width: 100%;
    height: 100%;
  }

  .rightPanel {
    transform: translate(0);
  }
}

.handle-button {
  width: 48px;
  height: 48px;
  position: absolute;
  left: -48px;
  text-align: center;
  font-size: 24px;
  border-radius: 6px 0 0 6px !important;
  z-index: 0;
  pointer-events: auto;
  color: #fff;
  line-height: 48px;
  i {
    font-size: 24px;
    line-height: 48px;
  }
}
</style>
